Improvement of arable Ldvcf. 1551 



cced, to heavy Lands, lee us take a fliorc 

 View how the Diilolution of them is effu% 

 ed. We muft obferve, that next to Heat, 

 (nay, I may fay^ equal to Heat) there is 

 nothing more piercing than Air in a clear 

 frofty I\ight, and ther^ftore it is no wonder, 

 if it works the fame Effefts as Heat does ^ for, 

 *tis very certain, that Heat, and Cold have a 

 virtual Tranficion without Ccmmunicaiion of 

 their Subftances fin every thing but Plants 

 and Animals) in Relation to each other, and 

 that the Air caufes this Diilolution purely of 

 itfclf (at lead with very little affiftance from 

 Heat and Moifture) condens'd and frozen 

 firfl, and afterwaidsrelax'd by its own genial 

 Warmth, with none, or very little, help from 

 the Sun : And it is obfervabie, that the drier 

 and finer the Air is (as is the cafe of clear 

 frofty Weather) the more fubtle and per- 

 fpiring it is. 1 have already in the firrt Vo- 

 lume faid fomewhat of the husky piercing 

 Winds in March^ and how prejudici- 

 al they are to the miiky emulgent Fibres 

 of a newly planted Tree, which will fuffici- 

 ently convince any Perfon thai takes notice 

 of it, how deep Air will penetrate into the 

 Earth 5 and, tho' this pure refined frofty Air 

 we are fpeaking of be not fo piercing as that 

 dry husky Air is, yet it is much more natu- 

 ral, as being fiift much finer, and hefides 

 aftaating with much more Moderation*, for 

 ^vhoiever examines the Origin and Violence 



pf 



